Rewrite documentation in mkdocs #26

Job	Run time
Test against different Python versions (3.7, ubuntu-latest)	27s
Test against different Python versions (3.7, windows-latest)	1m 41s
Test against different Python versions (3.7, macos-latest)	46s
Test against different Python versions (3.8, ubuntu-latest)	31s
Test against different Python versions (3.8, windows-latest)	1m 25s
Test against different Python versions (3.8, macos-latest)	50s
Test against different Python versions (3.9, ubuntu-latest)	31s
Test against different Python versions (3.9, windows-latest)	1m 43s
Test against different Python versions (3.9, macos-latest)	57s
Test against different Python versions (3.10, ubuntu-latest)	30s
Test against different Python versions (3.10, windows-latest)	1m 15s
Test against different Python versions (3.10, macos-latest)	51s
Test against different Python versions (3.11, ubuntu-latest)	33s
Test against different Python versions (3.11, windows-latest)	1m 35s
Test against different Python versions (3.11, macos-latest)	43s
	14m 18s

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